<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>大风车</title>
    <style>
        .wrap{
            width: 320px;
            height: 320px;
            position: relative;
            margin: 100px auto;
           animation: rotate 3s linear infinite;
        }
        .box1,.box2,.box3,.box4,.box5{
            width: 160px;
            height: 160px;
            position: absolute;
        }
        .box1{
            left:80px;
            top:0;
            border-radius: 50%;
            background-color: aqua;
            background: linear-gradient(to right,#00ced1 50%,transparent 50%);
        }
        .box2{
            left:160px;
            top:80px;
            border-radius: 50%;
            background-color: aqua;
            background: linear-gradient(#ff4500 50%,transparent 50%);
        }
        .box3{
            left:80px;
            top:160px;
            border-radius: 50%;
            background-color: aqua;
            background: linear-gradient(to left,#ffc0cb 50%,transparent 50%);
        }
        .box4{
            left:0;
            top:80px;
            border-radius: 50%;
            background-color: aqua;
            background: linear-gradient(transparent 50%,#d4dc14 50%);
        }
        @keyframes  rotate{
            from{
                transform: rotate(0deg);
            }
            to{
                transform: rotate(360deg);
            }
        }
    </style>
</head>
<body>
    <div class="wrap">
        <div class="box1"></div>
        <div class="box2"></div>
        <div class="box3"></div>
        <div class="box4"></div>
    </div>
</body>
</html>